10.1021/jo048228i.s001
Ji Yeon Lee
Ji Yeon
Lee
Sung Kuk Kim
Sung Kuk
Kim
Jong Hwa Jung
Jong Hwa
Jung
Jong Seung Kim
Jong Seung
Kim
Bifunctional Fluorescent Calix[4]arene
Chemosensor for Both a Cation and an
Anion
American Chemical Society
2005
excimer emission change
quenched monomer emission
excimer emissions
pyrene amide groups
metal ions
472 nm
fluorescence intensities
343 nm
analogue 2
2005-02-18 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Bifunctional_Fluorescent_Calix_4_arene_Chemosensor_for_Both_a_Cation_and_an_Anion/3300400
A new fluorogenic cone calix[4]triazacrown-5 (<b>1</b>) bearing two
pyrene amide groups and its structural analogue <b>2</b> have been
prepared. Excited at 343 nm, <b>1</b> and <b>2</b> reveal excimer
emissions at 448 and 472 nm, respectively. When heavy
metal ions such as Pb<sup>2+</sup> and Co<sup>2+</sup> are bound to <b>1</b>, the
fluorescence intensities of both monomer and excimer are
quenched whereas H bonding-assisted F<sup>-</sup> binding to <b>1</b> gives
rise to a quenched monomer emission with little excimer
emission change.